package top.tagao;


import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

/**
 * @author fu-xiao-liu
 * @Date 2022/4/14 10:35
 */
public class Main {
    public static void main(String[] args) {
        new B();

    }
}
class A {
    {
        System.out.println("4f");
    }
    static B b = new B();

    static {
        System.out.println("5f");
    }
    public A() {
        System.out.println("6f");
    }
}

class B extends A {
    {
        System.out.println("1s");
    }
    static {
        System.out.println("2s");
    }
    public B() {
        System.out.println("3s");
    }
}
//4
//6
//3
//1
//5f
//2s
//4f
//6s
//1s
//3s
